This might be slightly off-topic, but I'll give it a shot anyway. 

I do occationally play around with a 6509 and try to come up with new things
to try. Lately I've started to look into limiting traffic over
VLAN-interfaces. The 6509 runs hybrid image, and what I did was as simple
as: 

conf t
int vlan 20
ip address 192.168.1.0 255.255.255.0
rate-limit input 2000000 375000 400000 conform-action transmit exceed-action
drop
rate-limit output 2000000 375000 400000 conform-action transmit
exceed-action drop

I noticed that a show interface rate-limit gave very few packets passing
into the VLAN when I transferred large amounts of data between that VLAN and
another one, so clearly the traffic goes through another path, i.e through
the switch and not the router. 

What I am wondering about is if there is any easy way to set up similar
shaping on the switch, without messing around with QoS, I just want to set a
hard limit for drop of traffic without qualifing the traffic in any way. 

Would this be feasable if I run the native mode, and use the same rate-limit
commands on the switch as well as the router? I'll play around with this
anyway in the near future, but if anyone has experiences to share I'm
listening :-)

 


Bjxrn H. Lxken
Seniorkonsulent
Cap Gemini Ernst & Young

+47 24 12 79 19 (office)
+47 48 10 20 94 (mobile)
+47 24 12 80 01 (fax)

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